If I ran XP, I would be in the hang fire camp. I don't like Windows upgrades at the best of times as they have caused me problems both with my own PCs and with folkinfo (in that case my ISP installed a Windows service pack and the site went on a go slow - it took ages to get pages - it was later found that this SP screwed up the MySQL ODBC driver and they had to uninstall it until a resolution could be found).

I do believe in installing upgrades for reasons of security but there is no way I'd be installing one that looks to be known to cause problems. All I would be achiving is giving myself lots of headaches to later have the hassle of installing the "bug fixed" version.